Power transmission construction



May 19, 1931. P, CHAPMAN 1,805,612

POWER TRANSMISSION CONSTRUCTION Filed Jan. 23, 1951 Patented MayV1.9,:71931` PATEgNrjorFlci-: Y I

. `nachcmmiwtrjBaYsInn-i Nnwyonn n `l`rownn 'rmnsmssrolv CONSTRUCTION-Appncation mea ,January 2s, 1931'. semi no. 510,727.

This invention in power transmission .con-4 structionkr provides a meansof automatically transmitting .powerfrom adriving shaft to; a drivenshaft at a variable ratio vof speed.

Referring to the :accompanying drawings, Fig. lisa partelevationalpartfcutawayse tional drawing of' the `variabler speed transmission., cFig. 2 is an elevational view ofthe ,body of 1,9 the independent rotorgwhich'isalso shown tions of therotor and gyrators YVshown :in

inFigl.

Fig. 3 is a part sectional Y,part elevational? View showing an alternateconstruction ofthe gyratorshowninFg. 1. ,n f1y Fig. 4. and Fig.`5'showralternateconstruc F'g.g6 shows an alternate construction of therotor 6, being-analternateof Fig. 3.' Y Referringto Figsl and 2; a.cylindrical revolving shaft 5 delivers powerto, and

a cylindricalrevolvingfshaft 10 transmits n power away from thetransmission; or vice-versa.` Mounted upon andV attimes ro:-

, tatingaboutrthe shaft 5,` is agrotor 6 which has. protrudingcylindrical arms8L and 6b upon which at times revolve the gyrators yf7and 8p. respectively; and the independent gearrotor 9 also at timesrevolvesabout the cylindrical arm Y6b.' Fixed to the shaft 5 nearitsjend is a bevel gear (5 which-transmits theftorque from the shaft tothe bevel igearf'?a of ,the gyrator `7 and the bevellfgear of the in-4dependent gear rotor'91flhe torque is again transmitted from thebevel!'gear 7.? Vofthe gyrator 7, andthe bevel gear Qof the inde-v pendentgear rotor`9gitoV thevbevel geariXed to thepshaft 10.

When at times the rotor irotates about the shaft 5.a bevel gear Stofthe. gyrator "8in mesh with a bevel gear ring 11a "ofy the'- fixedsupport 11, causes thef-gyrator 8to"revolve about the cylindricalarmflfof .the rotor 6.

- The revolving shaftsjand vil() revolve kin the bearings 11b ,and .11Fof thefXed support 11. The shaft 5 has a raisedcylindrical por-A tionwith a thrust bearing 51 to receive y,the thrust of the rotor 6,` and araised portion and thrust bearing` 5*5 at f its ,end, ,to ,receive thethrust of the-bevel gear 10a. j; U; f

' forcesofthe gyrators 7 and Zand 8 torei'folveabout/the rotor6,.the1two. motions transferringV a torque to the shafty 10. k

1' `Since by construction the proportionof the perimeters of thefbevelgears aand 7a is not equal to the proportion of the perimeters of theybevel gears 10a and 7 b it is apparent that c f an unb alanced lforceL4exists which causes the rotation ,of the rotorr rlwhichrotation inAturn causes revolution of the gyrators 7 and 8.

.-Thisrevolution ofthegyrators 7 and 8 i with their rotation around theshaft 5 along with the rotor .6, furnishes the resistanceY to the saidunbalanced force,which resistance is the gyrators 7 andB kand. of therotation of the rotorG. 1 y

It follows then that the speed as well as the torquekof the shaft 5Yaects the rotation of the rotor and consequentlythe speed andtorque ofshaft'klO,` and the-ratio of speed change bedependent bothonthe speed ofrevolutionof tween them is consequently in a variable ratio.

yItis well known that ythe resistance of a revolving body to a change ofits plane of rotation is :due notonly to its kmass but 'also to itsspeedof revolution; anditis rupon this fact that 'the resistance ofthegyrators 7 and Sisbased."` Af .f Y- If the centers of 'revolution ofthegyrators 7 (andthe indepenvfklent.- gyrators 8 if used) lay upon theaxis ofthe shaft 55 the ratio of speeds ofthe shafts fand l0 would besomewherebetween unity andthe proportion indi-k y cated by the bevelgear ratios but because the centers do not lay on that aXis,' a definitefree rotation Vofthe gyrat-ors 7 (gyroscopic precession) exists Vforevery speed of their, revolution dependent on the distance of thecentersk fromthe axis'ofthe shaft 5. This free rotation removes theaforementioned limitationof the ratio of speed of driving shaft 5 andthe driven shaft 10.

Fig. 3 shows an alternate construction with the plane of the gyra-torweights 7 further removed from the axis oi' the drive shaft 5 than shownin Fig. 1.

Fig. 4 and Fig. 5 show alternate construc-y tions of the rotor 6 withthe protrudingcylim drical arms 6a and 6b not perpendicular to the axisof the shaft 5.

Fig. 6 shows the rotor 6 having an additional projecting cylindrical arm6ab as an f alternate construction.

It is apparent that the rotor -may have one or more projecting arms ofthe nature shown, that more or less gy'ra'tors'of'the type F orindependent gyrators of the type' 8 may be used,jand that thisconstructionfniay be .used with'the power appliedtliru thefs'haftl() andtaken away thru the shaft 5er viele-ve'rs'av y without affecting theprinciples of this invention.

I claim Y 1`. In power transmission consti-notion,- a fixed supportingcasing, adriving sliaft'e'ii` tendin intoone end of said casing, adriven shaft extending'into Ithe' opposite end of saideasin @axiallywith said driviiigfsliaft, a rotor reely mountedv coaXially`- on `saiddriving' shaft for rotation the'reahkiut'gcy'liiivv drieal armsfony saidrotor projeotingLi-adiab 1y therefrom one or more' gyratops' mountedeoaxijlly onsaid cylindrical arms for' revolution therebout, bevel gear'iiiiedly'nio'luntl ed'on'fsaid driving sliaftbeyond'said rotor, bevelgears .fiXedly mountedon saidlgyratdrs in mesh with said bevel gear onsaidfdriving shaft to revolve said gyr'z'itors arouiidsiid cylindricalfirms, bevelgenrs lixedlynieant; ed on said gyrato'rs inimesh*ivithafbevelg'ai ixedly mounted on the said driven shaft; suitablevWeights of ring forni fiiredly' mounted coaxially on said gyratorsvfory revoliition therewith,- a bevel gearv iixedly'niontedoi the saiddriven shaft'in mesh with saidbevel gears on said gyrators totransmitfpowerf'dei livered by'said driving shaft to said driven shaft.1 y

2. In 'power transmission construction, a fixed supporting casing; adriving shaft ex: tending into one end of saidcasing, a driven shaftextendng into the opposite endrof said casing coaxially with saiddrivingy shaft; a rotor freely mounted coaxially on saidpdriv'- ingshaft for rotation thereabout, cylindri; cal arms on said rotorprojectingA radially therefrom, one or more independent gear rotorsmounted'coaxially on said cylindrical armsforrevolution thereabout, abevelg'er ixedly mounted on said drivingfshaft befondfsaid freelymounted rotor, bevel gears f Xdly mounted on said independent gearrotors in mesh with said bevel gear on said driving'shaft torev'olve'jsa'id independent geai" rotors about said Cylindricalaiiis';4bevel bevel gears ixedly mounted on said independent gyratrs in meshwith a bevel ring gear xedly mounted on said fixed supporting casing, abevel ring gear fixedly mounted onsaid-'supportingeasing coaxially withsaid driven shaft in mesh with said bevel gears ttj 'said independentgyrz'itors,i suitable weights ofring' form fixe'dly mounted co1 axiallyon' said independent" gy'fratois'` for' revolution therewith.

3. *Inn powerl transmissiii- Const'ruotiem a fixed7 supporting casing,aidiivingsliaftexa tending int'one endof saidfcii'sing; ad'r'iven' shaftextending into the opposite end" df said easiiigfc'oaxiallwithsiddriving shaft, a roter reelyrndnn ed @axially on saidfdrvinfrshaft for rotation thereabout, oylindriai" nais (mf sind raaf preparingmainly therefrom, a bevel geaflixedly' iiieiiiited'dn said driving shaftbsoiid'said'rotongyrators mounted7 coaxial on saidy 1cylinariinlarnisfor" rfvnltion tliereabout, bevel gears' fixedly mounted on saidgyrators in me'sli with saldi gear on" said2 driving sliaft tbrevolvfsaid igyrator's around saidcyllndri# 'en mns, bevugem fixealy'mounted on sind gylators inm'esli with a bevelg'ear7 fix'edly mountedoiitlie saidl driven shaftgsuita'ble weights 'of2 ring forinxedlymoniit'edv coaXi ially" on Saidfgyiators fer revolutieii'theiev'vii'tli;independeiitf'gea rotors' 'mounted"coa'i ially on' said cylindricalarms'forfr'evolutioii thifeaboiit, bevel gears fixecily mounted on saidindepeiileiitY gear rotors in" mesh with said* bevel jgeir-oii saiddriving Ashaft" to re'i volifesaid independent gearrotrs' 'about saidc'yliiidrlftzalparrrisi,` bevel gears fix'edly mont ed'onsaidindependent gear rotors' in mesh yvvith'said bevel 'gear fix'edlymounted Ion said driven shaaiiidepend'nt gyratp-rs alsefeely mountedcoaixially'v on 'sa-id cylindric'lfainis fer revlntionuieraboin, bevelgears fixedly mounted on said independent gyrators in mesh with arbevelring gear fixedlymormted on said fixed supporting casing,l a bevel ringgear fixedly mounted on said supportingcasingfcoaxially with said'driven shaft in mesh with' said bevel gears on s'aid independentgyrators,` suitablevveights'off ring form Hiid- 1y mounted coaizia'llyYon said independent gyr'ators for revo1utiontherewith,a bevelgearfixedly'mounte'd 'on the 'said driven 'shaft inniesh with saidfbevlgears onsaidgyra'i tors and alsofin mesh wiihlsaid bevel gears on saidindependent rot'o'sto tae'risnit'pbwr iis Y attached to a driving shaft,a driving shaft extending consecutively through said fixed supportingcasing through said rotor through said bevel gear fixedly attached` andinto means of holding said driving shaft in alignment coaxially andlongitudinally withsaidf driven shaft, gyrators with coaxially iixedlyattached ring weights and lixedly attached bevel gears in mesh with saidbevel gear on said driving shaft and fixedly attached bevel` gears inmesh with said bevel gear on said driven shaft, means to produce likehand revoluble movement of said driven shaft at a rate of speedinversely proportional to the torque of said driven shaft for anyrevoluble speed and torque of said driving shaft by the deflection ofsaid gyrators from their planes of revolution as they rotate along withsaid l driven shaft in mesh with bevel gears ixedly rotor substantiallyas described. n i

5. ln power transmission construction, a driven shaft extending throughone end of a fixed supporting casing,- a-bevel gear iixedly attached tosaid driven shaft near the end of said driven shaft, a rotor withcylindrical arms projecting radially, a bevel gear fixedly f i attachedto a driving shaft, a driving shaft extending consecutively through saidfixed Y supporting casing through'said rotor through said bevel gearfixedly attached and into means of holding said driving shaft in alignhY ment coaxially and longitudinally with said driven shaft, independentgear rotorsmcunted coaxially on said cylindrical arms for revolutionthereabout, bevel gears ixedly at tached to said independent gear rotorsin mesh with said bevel gear on said driving g stantially as shown.

arms on said rotor projecting radially there-l from, gyrators coaxiallymounted onsaid arms for revolution thereabout, a bevel gear fixedlyattached to said driving shaft in mesh with bevel, gears lixedlyattached-to said gyrators, a bevel gear fixedly attached to said drivenshaft in mesh with bevel gears iixedly attached to said gyrators,suitable weights fixedly attached to saidgyrators for revolutiontherewith about a center removed from the axis of said driving shaft,gyrators revolving about centers not laying on the axis of rotation" orthe axis of said driving shaft means to obtain a variable ratio of speedo said driving shaftto said driven shaft sub- 7. In power transmissionconstruction, a

.xed supporting casing, a driven shaft ex.-

tending thru one end of said casing, a driving shaft extending thru theopposite end driven shaft for Vrotation thereabout, cylintherefrom, oneormore gyrators'coaxially ymounted on said arms for revolution there# ofsaid casing,-a rotor freely mounted on said` about, a bevel gear fixedlyattached' to said yfor revolution therewith about a center removed fromthe axisr of said vdriven shaft,

gyrators revolving about centers not laying` on the axis of rotation orthe axis'of said` driven shaft, means to obtain a variable ratio ofspeed of said driven shaft to said driving shaft substantially as shown.

y Signedat 1482 Broadway, New York city,

inthe county of New York and State of New York, this fifth day ofJanuary, A. D. 1931.

'l yPAUL CHAPMAN.

shaft,lbevel -gearsfixedly attached to said Y i independent .rotors inmesh with said bevel gear on said-driven shaft, independent gyratorswith suitable ring weights fixedly attached, bevel gears ixedlykattached to said Y independent gyrators in mesh with a ring gearrigidly attached to said fixed supporting casing, means to produce likehand revoluble movement of said driven shaft at a rate of speedinversely proportional to the torque of said driven shaft for anyrevoluble speed of said shaft by the deflection of said independentgyrators from their planes of revo- A lution as they rotate along withsaid rotorV substantially as described.

6. VIn power transmission construction, a

fixed supporting casing, ardriving shaft exlOO n tending thru one end ofsaid casing, a` driven Y shaft extending thru the opposite end of saidcasing, a rotor freely mounted on said driving shaft for rotationthereabout,cylindrical

